package com.lanhe.common.utils;

import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.Calendar;
import java.util.Date;
import java.util.Random;

/**
 * 时间工具类
 *
 * @author lanhe
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算相差天数
     */
    public static int differentDaysByMillisecond(Date date1, Date date2)
    {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 计算时间差
     *
     * @param endDate 最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endDate, Date startTime)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - startTime.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor)
    {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor)
    {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 往前偏移天
     *
     * @param day 天
     * @return 格式为20230101
     */
    public static Integer getDateDaysAgo(Integer day) {

        LocalDate currentDate = LocalDate.now();
        Period fiftyDaysAgo = Period.ofDays(day);
        LocalDate dateDaysAgo = currentDate.minus(fiftyDaysAgo);

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd");
        return Integer.valueOf(dateDaysAgo.format(formatter));
    }

    /**
     * 日期格式转换
     *
     * @param inputDateStr  20201201
     * @return 格式为2020-12-01
     */
    public static String formattedDateStr(String inputDateStr) {
        try {
            SimpleDateFormat inputDateFormat = new SimpleDateFormat("yyyyMMdd");
            SimpleDateFormat outputDateFormat = new SimpleDateFormat("yyyy-MM-dd");

            Date date = inputDateFormat.parse(inputDateStr);
            String formattedDateStr = outputDateFormat.format(date);

            return formattedDateStr;
        } catch (ParseException e) {
            e.printStackTrace();
            return null; // 处理日期解析异常
        }
    }

    public static String generateOrderCode() {
        // Get current timestamp
        String timestamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());

        // Generate a random number (you may want to use a more sophisticated randomization method)
        String randomPart = String.format("%04d", new Random().nextInt(10000));

        // Combine components to create the order code
        String orderCode = timestamp + randomPart;

        return orderCode;
    }

    /**
     * 判断是不是日期格式
     *
     * @param input 日期
     * @param format 格式，例如 yyyy-MM-dd,yyyy/MM/dd
     * @return boolean
     * @author zhanggl
     * @date 2023/12/21
     */
    public static boolean isValidDateFormat(String input, String format) {
        try {
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format);
            LocalDate.parse(input, formatter);
            return true;
        } catch (DateTimeParseException e) {
            return false;
        }
    }


    /**
     * 把EXCEL日期转出正常日期
     *
     * @param strDate excel日期如，44804，44804 五位数
     * @return java.lang.String
     * @author zhanggl
     * @date 2023/12/21
     */
    public static String excelDoubleToDate(String strDate) {
        if (strDate.length() == 5) {
            try {
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
                Date tDate = doubleToDate(Double.parseDouble(strDate));
                return sdf.format(tDate);
            } catch (Exception e) {
                e.printStackTrace();
                return strDate;
            }
        }
        return strDate;
    }

    public static Date doubleToDate(Double dVal) {
        Date tDate = new Date();
        Calendar calendar = Calendar.getInstance();
        long localOffset = (calendar.get(Calendar.ZONE_OFFSET) + calendar.get(Calendar.DST_OFFSET)) / (60 * 1000); //系统时区偏移 1900/1/1 到 1970/1/1 的 25569 天
        tDate.setTime((long) ((dVal - 25569) * 24 * 3600 * 1000 + localOffset));

        return tDate;
    }

}
